adds touch on save and before deletion
adds touch on save and before deletion

bloomberg/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,bloomberg/cartodb,bloomberg/cartodb,CartoDB/cartodb,CartoDB/cartodb,codeandtheory/cartodb,splashblot/dronedb,bloomberg/cartodb,CartoDB/cartodb,CartoDB/cartodb,codeandtheory/cartodb,codeandtheory/cartodb,splashblot/dronedb,bloomberg/cartodb,splashblot/dronedb,codeandtheory/cartodb,CartoDB/cartodb